JPS6326103U

JPS6326103U -

Info

Publication number: JPS6326103U
Application number: JP11777086U
Authority: JP
Priority date: 1986-07-31
Filing date: 1986-07-31
Publication date: 1988-02-20
Also published as: JPH0430802Y2

Description

[Brief explanation of the drawing]

第１図は本考案の実施例に係わる３段型誘電体
フイルタを示す一部切欠斜視図。第２図は第１図
の誘電体ブロツクを示す斜視図、第３図は誘電体
ブロツクにおける中央部の厚さの変化と周波数特
性の変化との関係を示す特性図、第４図は従来の
３段型誘電体フイルタを示す一部切欠斜視図、第
５図は第１図及び第４図の３段型誘電体フイルタ
の等価回路図である。１…誘電体ブロツク、２…上面、４，５…長辺
側の対の側面、６，７…短辺側の対の側面、８，
９，１０…貫通孔、１３…内面導体膜、１４…外
面導体膜、１６…入力端子ピン、１８…出力端子
ピン。 FIG. 1 is a partially cutaway perspective view showing a three-stage dielectric filter according to an embodiment of the present invention. Fig. 2 is a perspective view showing the dielectric block shown in Fig. 1, Fig. 3 is a characteristic diagram showing the relationship between the change in thickness at the center of the dielectric block and the change in frequency characteristics, and Fig. 4 is a diagram showing the relationship between the change in the thickness of the central part of the dielectric block and the change in frequency characteristics. FIG. 5 is a partially cutaway perspective view showing a three-stage dielectric filter, and FIG. 5 is an equivalent circuit diagram of the three-stage dielectric filter shown in FIGS. 1 and 4. DESCRIPTION OF SYMBOLS 1... Dielectric block, 2... Top surface, 4, 5... Pair of long side sides, 6, 7... Pair of short side sides, 8,
9, 10...Through hole, 13...Inner surface conductor film, 14...Outer surface conductor film, 16...Input terminal pin, 18...Output terminal pin.

Claims

[Claims for Utility Model Registration] A substantially rectangular upper surface 2, a lower surface 3 opposite to the upper surface 2, a pair of long side sides 4, 5 of the rectangle, and a pair of short side sides 6, 7 of the rectangle. Three or more resonator through-holes 8 extending from the upper surface 2 toward the lower surface 3 are provided in the rectangular columnar dielectric block 1 having
, 9, and 10 are provided, and the three or more resonator through holes 8, 9, and 10 are arranged along the longitudinal direction of the upper surface 2, and the three or more resonator through holes 8
, 9, 10, the one located at one end is the through hole of the input stage resonator, and the one located at the other end is the through hole of the output stage resonator. , 10, and an outer conductor film 13 is provided on the four side surfaces 4, 5, 6, and 7.
4, and a conductor film 15 connecting the inner conductor film 13 and the outer conductor film 14 on the lower surface 3, the three or more resonator through holes 8, 9, 10, so that the resonant frequencies of three or more resonators are substantially the same, the side surfaces of the pair of long sides in the portions corresponding to the input stage resonator through hole 8 and the output stage resonator through hole 10. 4,5 mutual spacing T
₁ , the mutual spacing T2 between the paired side surfaces 4 and 5 on the long sides in the portion corresponding to the through hole 9 between the input stage resonator through hole 8 and the output stage resonator through hole 10 is narrower than ₁ . A multi-stage dielectric filter characterized in that the upper surface 2 is substantially flat.